A security vulnerability was discovered in Heym, a system used for building and running agentic systems and business-process automations. Prior to version 0.0.73, Heym's HTTP workflow node made unvalidated outbound HTTP requests to user-specified URLs, allowing an unauthenticated attacker to exploit a Server-Side Request Forgery (SSRF) vulnerability. This was possible when a workflow targeting internal addresses was exposed with anonymous execution. The issue has been resolved in version 0.0.73, which adds validation for target host or IP addresses in the HTTP workflow node.